Spindle-bearing



(No Modal.)

J. EIL-BURN.

SPINDLE BEARING.

N.296,754. Patented Apr. 15, 1884.

lArnNr trice.,

JOHN KILBURN, OF LOVELL, MASSACHUSETTS.

"SPINDLE-BEARING.

SPECIFICATION forming part of Letters Patent No. 296,754, .lated April15, 1884.

Application filed June 1S, 1883. (No model.)

ing thelateral bearing for itslower end, the saidv bolsterbeingcontained in a bolster-case having a closed bottom and serving as anoil-well.,

Myinvention is an improvement on the class of spindle bearingsrepresented in United States Patent No. 227,129, dated May Il, 1880;

and it consists in a bolster-case provided with an internal annular orcircumferential groove and a bolster provided with notches, combinedwith a lockingring having projections to engage the notches ofthebolster, and having ears to enter the said annular or circumferentialgroove of the bolster-case, whereby the said locking-ring serves torestrain the bolster from rotation with the spindle, and also from beinglifted from the bolster-case by the lifting of the spindle. Y

Other features of invention will be hereinafter described, and pointedout in the claims at the end of this specification.

In this class of spindle-bearings referred to, the elastic or fibrouspacking in practice tied to the foot-step and to the bolster is apt tobe worn out by the rubbing of the bolster inside of it when the bolstermoves with the spindle, and the said packing thus worn out is easilytorn or twisted ofi", but by restraining the bol ster from rotation thediiiiculties are obviated. It is essential for the best results that thebol ster be so held that it will be free to yield in every direction asthe foot of the spindle wan ders on its step to find its true center ofrotation; -and to that end I have made the lockingring of such widthwith relation to the internal diameter of the bolster-case and theexternal diameter of the bolster as to provide for the necessary ordesired movement of the top of the bolster.

Figure l represents in elevation a spindle and step and nut, and insection the sleevewhirl, step-rail, bolster, and parts in thebolstercase, the latter being partially in section; Fig. 2, a top viewof only the` end oi the bolster-case; Fig. 3, a sectional detail of theinterior of the bolstercase just below its upper end 5 Fig. 4, a topview of the bolster; Fig. 5, an enlarged cross-section of thebolster-case just above thelocking-ring, Fig. G, a detail of the capremoved; and Fig. 7 shows the lool;- ing-ring by itself.

The step-rail A, nut A', bolster-case B, spindle C, foot-step D, andelastic packing E are substantially as usual, and as in the said patent,except that I have provided the interior of the bolster-case, near itsupper end,with, as herein shown, two short auxiliary orcircumierentially-extended grooves, 2 8, which communicate with an'.intersecting groove, et, ei;-

ytended downward from the top of the bolster- The upper end of thebolster F is notched,-

as shown at 5, to be entered bythe projections 6 of the locking-ring G,the latter at its pe riphery having two lugs, 7. (See Fig. 7.) To

apply the ring G, so as to restrain the bolster F from rot-ation withthe spindle, and also to keep the locking device down in engagement withthe upper end of the bolster, l place two of the notches 5 of thebolster in line with the vertical or intersecting grooves 44, andplacing the lugs 7 in the grooves 4, the ring is pushed down until itsprojections 6 enter the notches 5 in the bolster, and as the lugs 7 comeopposite the grooves 3 the ring is partially rotated, causing the lugs 7to enter the grooves V3, (see Fig. 5,) the projections 6 in engagementwith the bolster partially rotating it, and the lugs 7 as they reach theends ofthe short annularly or circumferentially extended grooves 3, arearrested, preventing any further rotation of the bolster in thatdirection, the direction being that ofthe rotation of the spindle. The

width of the ring is less than the distance be- 9 tween the inner wallof the bolsterLcase and the external diameter of the bolster, and thisdifference between the width of the ring and the space between thebolster and bolster oase affords room for such lateral movement of theICO bolster as is desirable, and may be more or less. rlhis locking-ringis very simple, and may be made quickly and cheaply, and may be readilyapplied to old bolster-eases and bolsters now in use by simply providingthe bolster with notches and the bolster-case with grooves 4 and 3,which may be done cheaply and quickly, using for the production ofgroove 3 a very simple milling-tool on a short shaft.

The cap f is liable to be thrown out of the bolstercase by the vibrationof the spindle, and to overcome this objection I have provided thebolster-case with the two partial grooves 2 2, into which the lug 10 onthe said cap is turned, after having` been moved down into the saidgroove 4.

The sleeve-whirl is marked H.

I do not broadly claim a pin or projection to restrain the rotation ofthe bolster, as I am aware that that is old.

I claimn 1. The bolster and the bolster-case, conibined with a ringlocated at the upper end of the bolster, the said parts being,` providedwith notches an d projections, to enable the said ring to co-operatewith the said bolster and case and restrain the rotation of the bolsterin the said case, substantially as described.

2. The bolster-case provided with the groove 3, and the bolster notchedat its upper end, combined with the locking-ring having lugs adapted toenter the grooves of the case, and proj ections to enter the notches ofthe bolster, to operate substantially as described.

3. The bolster case and bolster, combined with a narrow locking-ringadapted to hold the bolster and to be held by the bolster-case, the saidring being of less width than the space between the interior of the saidcase and the exterior of the bolster, substantially as described.

In testimony whereof I have signed my name to this specilication in thepresence of two subscribing witnesses. I

JOHN KILBURN. Vitnesses:

WM. F. DRAPER, GEO. W. GREGORY.

